Sit tall with legs extended, arms holding straps at shoulder height.
Start with elbows bent, hands near chest, palms facing inward.
Open elbows wide, rotating shoulders externally while keeping chest lifted.
Return with control, maintaining upright posture and steady strap tension.
シーテッドロー プレップ(肘を外に開く) 运动指南 - 僧帽筋(中部) 锻炼 | MuscleWiki